Fire-brick arch for locomotive fire-boxes.



E. P. STEVENS.

, FIRE BRICK ARCH FOR LOGOMOTIVE FIRE BOXES.

APPLICATION FILED NOV. 1,1910.

1,01 6,454! 7 Patented Feb. 6,1912

-. I UmTEDsTATEsrATENT "OFFICE.

Enoch r. srsvnns, or' 'oRcA'N PARK, ILLINOIS.

rmaaaioxanon: r03 rooo vrorrvn FIRE-BOXES.

' To all iimcy concern: I I it Be it known that 'I, ENocH P; STEVENIS,

' acitizen. of theUnited States, residing at -Morgan Park, in the countyof. Cook and .State'of Illinois, have invented certain new and usefulImprovements in F ire-Brick Arches for Locomotive Fire-Boxes," of whicht-he following is a specification.

i The invention. relates to improvements in fire brick arches whichext-endifrorn one side to the other of thefire box ofalocomotive,

' crease the durability of the water pipes supfurther, to obtain an archwhichcan be and from the front wall of the fire boxtoward, but not-to,the back wall thereof.

- The object of this invention is to obtain a'fire brick arch Which-willbev easily built into place in the fire box and which will not onlybe'durable, but Which will, also, in-

porting the arch; .to obtain an arch which will aid combustion in thefire box and tend to prevent cinders leaving the fire box; and

taken down without destroying the supporting water pipes thereof. a

The manner in which I attain-the above named, and other hereinafterrecited results is fully set forth in the drawing and descriptionabout'to be given, of the mech-, amsm embodying sa1d invention.

of the fire bricks which form said arch,

Fig. 4 is a front view of -a fire brick.

The same reference letter is applied to designate a given partthroughout the several figures of the drawing.

. A -'is the front'of a locomotive fire box;- F, F, are tubes; B theback, C the top and D'the grate of said fire box.

- E is a fire brick arch embodying this in vention, and is built up withthe fire bricks e, e and e resting on and covering the water tubes F, F.The fire bricks e are provided'with the projection g which is made forthe purpose of increasing the length of 'theside h which comes incontact with the 'side of the fire box A. The side h, is pro -vided withthe recess 2', whichis substantially oftbe'smntourofone half of one of ISpecif cation of Letters Patent. Application filed November 7, 1910.

scribed.

. box.

Serial No. 591,018.

the .pipes or water tubes -F, and the end of recess 2' is cutaway topermit said bricks Patented'Feb. 6, 191 2.

e to .be turned into place with the water a tube in the recess. v Thisplacinga-nd turning of the firebricks -e' is substantially the same .asthe turning and placing in position of the fire bricksejand 6,, abouttobe de- The fire bricks and e are similar, except that the bricks e aredeeper than the bricks e are. Both of these bricks are. pro-- vided, .atboth ends thereof, with recesses i,

of the'brickse, (also lettered 2'). The manner ofplacing' the bricks eand e" inv place on the water tubes F,;F, is well illustrated in Fig, 3,as is also the positionof these bricks onsaid tubes after they areproperly placed. I

After the several bricks 6,6 and e" are -in place on the water tubes F,F, and while the arch is being built up, the cut away por tion (1 isfilled with. a mixture ofwetted fire clay, (unburned); of a thick pastycon which are similar to the recesses on one end sistency, (7 0, Fig.3). which mixture becomes L baked when-the fii'e box isput into use by?the building of a fire therein.

By alternating the fire bricks e and e in a row resting on the tubes "F,F, recesses will be formed on the under side of the arch embodying thisinvention, while by using only fire bricks efa very durable constructionis obtained, which is well capable of resisting the flames of the firein the fire I have found it desirable to build at least the middle row,in a fire box which is provided wit-l1 four water tubes to support thearch, entirely of the bricks e, and

to build the remaining rows of bricks e and e arranged to alternate 111a given row, and also in the next ad acent row (which 1s made of brickse). The depth of the bricks 6 may also be made to vary correspondingly'with' the variance of bricks e, e, or theymay all be made of the same,depth, as preferred.

Those skilled. in the art will readily un- I derstand that the row ofbricks between the middle tubes F is subjected to greater heat than are.the remaining rows. And also, that the portion of the water tubes onwhich the bricks of the arch rest, when said tubes are underneath thearch. that is,the arch resting thereon, are subject to greaterfluctuations of temperature than is the portion between said arch andthe back B of the fire .box, and that protecting the said tubes in themannererein described and illus trated,"the liability of t eir givingway is lessened; but it hasher tofore been found impossible to place thefirebricks forming the arch on the water tubes so as to embed said-tubesin the arch as is done by me in [this device. The rounding of the endsof the an. arch consisting of fire bricks respec- I "recesses which'fit' to the'water tubes is termed'by me chamfe'ring an'd'said ends are,therefor, said to be chamfered.

'Iclaim';

1. "locomotive f fire box having 'water tubes extending" from the 'frontto the back walls thereof, in combination with tively'j provided withrecesses in the ends which come adjacent to said tubes, saidrecor're'sponding ,in v shape with said tubes'and chamfered-"at one endto permit the"turning of the bricks'into position on vided with recessesin the ends which come" adjacent to said tubes, saidrecesses.correspending injshape with said tubes and vember, 1 910,

chamfered atone end to permit the turning "of the bricks intoposition'on the tubes and some of said bricks made of 'a given thickness and theremaining ones of a less thick-., ness, to obtain recesses on the underside of the arch built up therefrom, and non-combustible material in thespaces insaid arch 1 which are made by the 'chamfering of the ends ofthe recesses. 3.'The combination of a locomotive fire box and watertubes extending from the front to the-back walls, thereof, with a firebrick arch consisting of a plurality of rows of bricks from the frontwall of the fire box toward theba'c k wall, and each of said rowsconsisting of a plurality of bricks, said fire bricks respectivelyprovided with recesses inthe ends thereof which come adjacent to saidtubes, said. recesses corres onding in shape withs'aid tubes and charmered at one -end to permit theturning of the bricks into .position onthe, tubes, and non-combustible material in the spaces. in said' archwhich are made by the chamfering of the end of a the recesses.

I Signed at Chicago, this 3rd day-of No- ENocn P.' STEVENS.

In the presence of- CHARLES TURNER BROWN, Com A. Am ne.

